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What are MCP Servers?

Source
fly.io
Date
Why it matters

Gives usable mental models for — tool skills an installs and discovers, rather than an API you call — which clarifies when writing a server is worth it and what the protocol actually exchanges.

Terms in this piece · Glossary
  • MCP — The Model Context Protocol — an open standard that lets any AI assistant plug into any tool or data source without custom integration code.
  • LLM — A large language model — the neural network behind tools like Claude and ChatGPT, trained on huge amounts of text to predict what comes next.
  • agent skill — A reusable instruction file that teaches an agent how to do one job well — the procedure, the tools, and what counts as done.
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